North-Western: region in Zambia
What exactly constitutes the spatial extent of the city? For these aggregations, we used the Global Human Settlement Layer Urban Center Database (GHS-UCDB) to define the boundaries of the city. These cities -- or urban centers -- cover areas that are densely populated and built-up, and so may extend beyond the spatial borders of these cities that we may be familiar with. The GHS area is shaded in blue.
View North-Western, Zambia on the sprawlmap
Most recent snapshot: Taking into account the entire (i.e. aggregate) street network in North-Western as of 2014, the overall level of street-network sprawl is 3.53, which is highly disconnected.
Trends in street network construction: The SNDis of street construction for the respective time periods are 2.25, 1.85, 3.15 and 4.56. The disconnectivity of new streets constructed in North-Western fell, then rose. In 1976-1990, new street layouts were the most connected.
Quantity of street network construction: The street network in North-Western spans a total of 4718 kilometers. It is dominated by roads constructed in 2001-2014. These roads have an SNDi of 4.56, which is highly disconnected.
Effect on the aggregate network: New construction in each period adds to the total stock of streets, but does not change streets that have already been built. Therefore, it has a limited effect on the street network as a whole. The SNDis of the aggregate street network in the respective time periods are 2.25, 2.02, 2.23 and 3.53. The SNDi of the aggregate street network in fell at first, but North-Western has worsened in disconnectivity since 1990.
The level of street-network sprawl in new development in North-Western was at its lowest in 1976-1990. To get a sense of how street development has changed in North-Western, we can consider three of its most populous cities: Solwezi, Mwinilunga and Zambezi. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Solwezi was at its lowest in 1991-2000. The level of street-network sprawl in new development in Mwinilunga followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Zambezi followed a zig-zag trend with an overall increase.
How do development practices in North-Western fare in comparison to others in Zambia? Most recently in 2001-2014, street construction in North-Western was the 1st-most disconnected out of the 10 regions in Zambia. Its position in the ranks since 1975 has risen; relative to other regions in Zambia, street construction in North-Western has become more disconnected. North-Western ranked 5th in 1975, 10th in 1976-1990, 7th in 1991-2000 and 1st in 2001-2014.
As of 2014, the city with the most disconnected street network in North-Western is Zambezi with an SNDi of 3.62, which is highly disconnected. Conversely, the most connected city is Solwezi with an SNDi of 2.34, which is in the 40th to 60th percentile of disconnectedness. See trends for these cities: Solwezi, Zambezi
The level of street-network sprawl in the aggregate network in North-Western was at its lowest in 1976-1990. To get a sense of how the aggregate street network has changed in North-Western, we can consider three of its most populous cities: Solwezi, Mwinilunga and Zambezi. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in the aggregate network in Solwezi was at its lowest in 1991-2000. The level of street-network sprawl in the aggregate network in Mwinilunga rose steadily. The level of street-network sprawl in the aggregate network in Zambezi was at its lowest in 1991-2000.
To date, North-Western is the 3rd-most disconnected out of the 10 regions in Zambia. Its position in the ranks since 1975 has risen; relative to other regions in Zambia, the street network in North-Western has become more disconnected. North-Western ranked 5th in 1975, 9th in 1976-1990, 7th in 1991-2000 and 3rd in 2001-2014.